How to set a XH-W3001 thermostat module, and a look inside.

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How to set a XH-W3001 thermostat module, and a look inside.

Рет қаралды 350,608

7 жыл бұрын

A quick look at the programming and circuitry of a common and very simple Chinese thermostat module. The module is designed for 12V but is apparently available in other voltage variants. The output is switched 12V on this unit and has the matching negative wire to drive a load directly.
The module can control heating or cooling by the use of a start temperature and a stop temperature.
To set a temperature press and hold one of the buttons until the display starts flashing. The left button is for the ON temperature and the right button is for the OFF temperature. While the display is flashing that temperature can be adjusted up and down in small 0.1 degree steps or faster if the up/down button is held in continuously. When the temperature has been set the display will stop flashing after a short delay and revert to displaying the current sensed temperature.
Hysteresis (temperature difference between turning on and off) is simply set by choosing that gap between the on and off settings. So an ON temperature of 20C and an OFF temperature of 23C would have a hysteresis of 3C.
The relay is apparently rated for 10A, but will be more reliable if used at much lower current. The switched output can drive an external relay or small load directly.
Pressing and holding both buttons will do a short display test and revert to factory set temperatures.
Any temperature setting changes are stored in nonvolatile memory and will be kept even if the unit is powered down.
The module uses a common 10K NTC thermistor.
Here's a general eBay search link for this unit:-
www.ebay.com/sc...
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
www.bigclive.co...

Пікірлер: 454

@sienile 7 жыл бұрын

This will do nicely for my computer desk fan setup. The always on during a fault issue will actually be a plus in that usage and any other case when used to cool vital components.

@TheAkashicTraveller 7 жыл бұрын

Except it only wen't always on when he shorted it. If it's off when it fails and then it gets hotter...

@joeo6378 Жыл бұрын

Picked this up to add a couple old PC fans to my hen house. When it gets too warm in there a couple fans will start circulating air and turn on a light as a warning. Very simple and nice. Thanks for the video.

@sharonkwamboka-xf8ro 2 ай бұрын

Hello Sir, I don't know what I have been doing wrong, mine reads 12v 110v 220v but I keep on short-circuiting them. Kindly assist me out on how to regulate the amount of power needed. Thank you

@Lordskeep 2 ай бұрын

@@sharonkwamboka-xf8ro They are marked on the back with a marker for the voltage. They only come in two voltage types. Yours is either 12 volts or 110 thru 220 volts

@goldfools5445 3 жыл бұрын

I used one of these to fix an expensive portable fridge that was going to cost me hundreds of dollars to repair the board. Fortunately the compressor still ran continually with emergency bypass. I just tapped into the power cable with an automotive relay. Works perfectly. Has no lower power disconnect though. I reckon the Chinese might have one of those modules for a couple of bucks. Thanks for this video it helped me a lot.

@Watchyn_Yarwood 7 жыл бұрын

I had a lot of fun with this item! So glad you made this video as my fridge is 20+ years old and I fear one day I would awaken to a puddle in the floor from the unit dying overnight. I ordered four of these, 4 12v wall warts, 4 female power jacks, and 4 intermittent sounders. Wired the sounder in to the relay, drilled a hole for the power jack, drilled 6 holes for the sound to escape, put the sounder inside, tight fit but it worked, super glued a magnet to the base, stuck it to the side of the fridge, set it up to monitor the freezer temperature! I used one as a proof of concept, one as a prototype and gave the other two to my brothers. I used the prototype for my personal one and threw the proof of concept one in the junk drawer for future experiments. Only problem was waiting weeks for the components to arrive from China!

@thelydiaspringexperiment6437 2 жыл бұрын

buy the thermostat version for 110-220v and its easy (3 wires) replacement for your fridge thermostat. if the fridge dies its either thermostat or the varistor disc thats on the rear of the compressor. both are janky old crap. best fix them both with modern controls instead of waiting for them to fail

@greenmanreddog 7 жыл бұрын

I reckon the "on when thermistor shorted" feature/weakness is actually intentional design and not an oversight. Consider how you could use a switch to override the controller by placing it in parallel with the thermistor. The advantage of this over having an external bypass switch, is that the controller will indicate an override is active on its display. Also, the switch doesn't have to be capable of switching the 'high' current passing through the load. I suspect the load on/off state for a short and open circuit thermistor will reverse if you set it to "cooling mode".

@MichaelSteeves 7 жыл бұрын

The difference between set point and reset point is normally called "deadband". Hysteresis is usually used to define the difference between in a continuous output when the signal is rising or falling.

@puretruth6379 5 жыл бұрын

I got the same thing, only in 220V, so yes, it can be made in different voltages. On the back it says 12V 110V 220V where mine is marked. Great educational video.

@Yr-Anghenfil 7 жыл бұрын

It's incredible how soothing & therapeutic I find your videos haha

@stephenmalone3230 7 жыл бұрын

I just purchased one of these for controlling a home made solar powered roof (attic) fan setup and came across your very useful demo on how to set it up and adjust it, many thanks. Tomorrows and the following two days peak temp is 40+C so the roof extractor should continuously operation if this has been correctly followed i.e. Well into the red zone NSW in Oz

@thelydiaspringexperiment6437 2 жыл бұрын

cheers clive. i got one on aliexpress for a quid fifty but no instructions. yesterday my 7 month old fridge died because of the thermostat. i now have installed this gadget and have a digital fridge! i also removed the motor start varistor and built a circuit with a capacitor and 2 relays to give the start winding a fraction second pulse when needed. where i live there are lots of powerline issues where the power can drop for just long enough for a motor to stop but not long enough for a varistor to cool off, leaving the compressor to cook until the overtemp cutout trips. i recommend both these mods to anyone capable. it also cures the problem with keeping a deep freeze in the garage in the cold then having it self defrost on a cold day and ruin your food. in my case i still had 2 year guarantee but taking it back to the shop would cost in petrol 4x the price of this thermostat i had on the shelf. i get really pissed off as an electronics engineer when i see the jenky way cars and domestic appliances are wired just to save a penny per unit.

@TheJohn8765 7 жыл бұрын

I bought a 120v sous-vide temp control module for my vodka/brewing setup (it controls the heat mats I use to warm the fermenters) and it's been one of my best e-bay purchases yet. Very reliable and quite versatile for brewing with 0.1 deg precision and all sorts of alarm conditions and stuff I don't even need. It was around $25 CAD and a comparable unit here was something crazy like $125 or higher. When they care to, Chinese factories can turn out some very well-engineered stuff for not a lot of money.

@locouk 7 жыл бұрын

I can't wait till you get your Silver Play button, just think of the LED modifications you can make to it to make it extra awesome!

@twocvbloke 7 жыл бұрын

There should be a clive-special play button, in pink and made with something suitably dangerous... :P

@bigclivedotcom 7 жыл бұрын

It finally arrived. I've not decided what to do with it yet. In fact it's still in its box.

@simaorodrigues6285 7 жыл бұрын

Vinyl wrap it in pink, get a big enough frame and add some lights! It'd make for a pretty cool video IMHO. After that, restore it to its original condition and hang it pretty in your home, as a reminder to yourself of how someone (you) from the Isle of Man can make such a big impact on the lives of so many people around the world!

@fluteplayerify 7 жыл бұрын

It needs a capacitor dropper.

@wupme 7 жыл бұрын

Neon Pink!

@Bigrignohio 7 жыл бұрын

Another thermostat for converting freezers to energy efficient refrigerators! Quite popular with the off-grid crowd.

@Cheese_1337 4 жыл бұрын

sounds nice

@CryptoPivot 2 жыл бұрын

I bought 3 of these. Installed one on my RV, over the range fan. Seems the small brains can’t remember to turn on the fan when cooking. This is great in that it now turns it on automatically when it detects heat.

@shawnkerr291 7 жыл бұрын

Surprising how often you see the little Songle relays, and how tough the little buggers are.

@tonysuffolk 4 жыл бұрын

Thanks Clive. I bought one on E Bay and there were no instructions. I couldn't work out how to set it using trial and error. Your video saved the day. I've used it with my slow cooker to do some sous vide cooking. (These are available to control a 250 volt supply.)

@claudemaire9741 4 жыл бұрын

I purchased one to fix a 1500W heater. One version is given for 220V 10A. Must say that for 3.35€ including shipping, it is rather competitive! Just installed it and works well. No clue about long term reliability. But for this price...Thanks for the clear video explaining how to set "heating"/"cooling mode" which is not straightforward on the website. Hope the coronavirus was not in the parcel :-)

@windows7ge357 7 жыл бұрын

I built myself a refrigerator using a 100W peltier plate and I'm powering it with the +12V rail of a ATX PSU. The current issue I have is it just runs as cold as the room will let it get. Which is causing large amounts of ice to build up on the heatsink inside the unit which is causing cooling effectiveness issues. Not to mention the ice buildup is stopping the fan from circulating the cold air inside the unit. This seems like the perfect "legos for adults" component to regulate the internal temperature more effectively if it can run off +12V and deliver up to 100W.

@atbglenn 7 жыл бұрын

I purchased one to use to cool my power supply when loaded. Works fantastic!

@DoRC 7 жыл бұрын

I've found most of these controls work fine (for hobby use only of course) but it never drive more than an amp or so directly. It's always a good idea to drive and nice name brand relay.

@olli1964germany 2 жыл бұрын

yes, not even the cables are ready for 10 A

@phils4634 7 жыл бұрын

An even-cheaper version of the DIN modular thermostat packages from Willhay Electronics. Mind you theirs were 240V rated, with everything programmable, alarm contacts, o/p changeover contacts, etc for a rather measly $20 AU! If you don't need sophistication, this would be great - idea as a fridge thermostat, or fishtank heater stat. That PCB has a lot of space and markings for added components, so its probable that there is a 240V version out there. Well worth looking for, and I'll be buying a few to play with. Thanks Clive!

@OneMystified 3 жыл бұрын

I bought one for 220V/1500W and it principally works the same, though it is not as intuitive to use as the one you are demonstrating, it does not flash when the settings are ready to be changed. Does the job, heats up a silicon heating pad within the range. My only comment would be the in/out wiring which seems to be rather flimsy for such high voltages and wattage, the heating pad is 750W and there are 2 of them, seems to work fine. Thanks for helping with figuring out how to set the controller, difficult when it comes with no instructions.

@markiangooley 7 жыл бұрын

Waterproof probe and ability to handle mains voltage, and you could use an improved version to control a cheap slow-cooker for use as a sous-vide water bath.

@fredNS 5 жыл бұрын

markiangooley that's what I did! The unit controls a contactor->1000w immersion heater, best stakes I've ever cooked 😀

@sh20130 5 жыл бұрын

This controller was used on our incubator. It started to overheat and this was just the solution. Thank you. I hope the quail eggs will be alright from. The moment it overheated...

@jlopezleon 3 ай бұрын

Hello. I am planning to put it in my incubator so my question is " How many degree do you put ON - OFF time?

@sharonkwamboka-xf8ro 2 ай бұрын

@@jlopezleonoff 38.0 On 37.2

@howarddickson636 4 жыл бұрын

Thanks indeed for your insight Clive. I had to find a circuit diagramme for the same item that I have just received. As always you are very helpful... Excellent review. My app is for controlling a heated box with a terrarium heater lamp for bread prooving and fungi culture. Let's see how the 240 V version goes with the relay etc.

@dancoulson6579 7 жыл бұрын

Seems a solid little unit. Could easily power a larger external relay to power heavier equipment.

@AnEerieWorld 2 жыл бұрын

Help me plz...how do I convert this to 12v to 110-220v

@liquarles 5 жыл бұрын

Excellent instruction. Thank you for your detailed examination of the module.

@cozzyinternet4706 5 жыл бұрын

I got this exact product & model in my mail today......so I'm glad I found this video to see how it really works..... cheers! :D

@deepakgurung3853 4 жыл бұрын

Is it still working?

@mortoopz 7 жыл бұрын

Aww damn, wish I knew these things existed when I built my new computer, a bunch of those with the thermistors gooped onto the various heat syncs would be great fan controls

@England91 7 жыл бұрын

Mort OOPz you're more better of using it for the air inside the case than the heatsinks

@farenvanwyk5587 4 жыл бұрын

Thank you Clive . Educational as always. Keep up the excellent work

@farenheitplus 7 жыл бұрын

Thank you so much. I have a 220V AC version of the exact same device. Using what I could see in your video I modded mine to run on 12V DC. Works like a charm.

@jorgewilliam539 3 жыл бұрын

How you mod that to run on 12v please let me know

@jorgewilliam539 3 жыл бұрын

How you mod this to run on 12v

@pelecho 3 ай бұрын

Thanks !!! I couldn’t set it up and this video help me a lot 👍 👏 😊

@robjans741 4 жыл бұрын

Awesome pronunciation of frosty beverage.

@-yeme- 7 жыл бұрын

I suppose when theres a fault or disconnection of the temperature probe its pretty much 50/50 whether it would be preferable for it to default to on or off depending on the application, especially since it can be used in both directions. like you say you need an extra failsafe mechanism. but the thing is probably intended to a just a part of a wider control system so thats fair enough

@rocketman221projects 7 жыл бұрын

The microcontroller is an STM8003F3 series with 8KB of flash memory. If you have an ST-Link V2 programmer and can access the programming pin (pin 18), you could reprogram it with some custom firmware to fix the output staying on when the sensor gets disconnected.

@o0OMouseO0o 7 жыл бұрын

I'm wondering if the empty 4 pin connector under the STM8 chip is the SWIM programming connector making this even easier to do.

@TheJort123 Жыл бұрын

I've been looking all over the place for the microcontroller used. Thanks for the info!

@ericgee6585 7 жыл бұрын

Hi I guess if it's used for keeping something cold it's better to default to ON. However a second layer of protection is always advisable. Great videos by the way.

@conradinkranz4968 4 жыл бұрын

hey, im trying to use this to switch a heat cartridge, i have the 12v 120w model. So what i did is, i hooked up a Lipo 3 cell 12v battery to the input, and a 12v 40 watt 3d printer heat cartridge on the output, i set it up just like he did in the video to heat, but even when the output light is on, the heat cartridge does not heat up, anyone has an idea what could be wrong ? is it the lipo ? only thing i could imagine being the problem is the heat cartridge being broken :/ please help :(

@buster81365 5 жыл бұрын

yes it comes in various voltages i got 1 that is 220 v ac and it has check marks where they indicate voltage when built / made . there is 12v dc, 24 v dc and 220 v ac choices available mine is 220 v ac to control my air conditioner here in the philippines Thank You very informative video v

@LiveUthing 5 жыл бұрын

Thanks for this, I learned quite a bit. Well presented video. I purchased this for my 12 volt cooler on Amazon. I didn't like that the peltier cooler was on all the time when plugged in, will see if this can minimize my solar electric charged battery consumption on my DIY stepvan tiny home. Cheers from Canada.

@matthewbeddow3278 7 жыл бұрын

Thanks Clive I know I've paid for uk models maybe 60-100 quid in the past , some of these however had proportional band setting and other offsets etc..Interesting unit

@thelydiaspringexperiment6437 2 жыл бұрын

the 4 button models have offset and hysteresis settings and only a quid more.

@jstro-hobbytech 10 ай бұрын

I have a ptcheater fan for an enclosure I'm building. The ptc fan module was pulling 10amps even when it was off

@davidgriffiths2223 7 жыл бұрын

Great little device for running an over temp siren for our server room.

@glassius85 7 жыл бұрын

Would love to see a comparison and your general take on what is practically the default option for temperature control in home brewing; the STC-1000. It's only around £8 on ebay and almost everyone that builds a fermentation chamber or kegerator seems to be using it.

@albertjones5098 5 жыл бұрын

One thing the XH-W3001 it doesn't appear to have is a Fahrenheit mode. Living in the US I never think in Celsius. Usually require an online converter to figure Fahrenheit. Most of the other W series thermostats you're able to switch between Celsius and Fahrenheit.

@AndrewWalsh43 7 жыл бұрын

The fact that the load doesn't switch off if the thermistor is disconnected or at fault means that it has probably been designed for cooling applications as opposed to heating applications. Not necessarily a fault depending on what the application it is used for.

@welshnutterz 7 жыл бұрын

handy device, it could be good for controlling venting fans in a camper van to keep it cool

@bobjackson4720 6 жыл бұрын

I bought a 240V one, I'm going to use it to turn on a fan on a solar heater. Thanks for this information, mine came with nothing.

@darrendaz6969 4 жыл бұрын

Hi Clive. I have a similar thermostat to control my 12v fan in my greenhouse. The fan is meant to be rated to 220w. It’s an improvement from the 80w that was there b4. My question is: as it was a £40.00 car rad eBay fan, when measuring current x volts I get 100+ watts at best. A wee review on output of car fans would be great. Also how to build your own 12v temp control circuit. Tried to build one once, then purchased on lol. Keep up the content mate, it’s enlightens plus entertains!greating from the East Neuk of Fife!! 👍

@ArixZajicek 3 жыл бұрын

I'm sure there are scenarios where keeping something at temperature would necessitate the failure mode to be keeping the load on. I.e. I'd rather have a fridge cool too much and freeze things (unless its compressor required a certain off time) than to suddenly cut off and have to throw everything out, suppose it just depends on the application.

@Mars5826 3 жыл бұрын

I have 1 connected to my DIY solar hotwater pump (aquaponics) and it works perfectly

@GloriaLeggio-ou1st Ай бұрын

So clear and helpful!!

@TheOfficialBatteryMan 5 жыл бұрын

Thanks big Clive. You’ve helped me. I needed to know if it would remember the settings when the power was removed as I plan to use it to turn on a diesel water heater to keep a circuit from freezing

@ianmaund5223 2 жыл бұрын

Yes it works from the mains I have one on my vivarium heatmat

@squishy312 7 жыл бұрын

That would work great for a heated bed on a 3D printer as a secondary controller rather than going through the circuit board. It would have to be used as a sending signal only though. The heatbeds usually draw around 10 amps while heating at 12 volts. Maybe going through an SSR or something might work.

@agudders 4 жыл бұрын

I am looking to use a 220v version to control tube heater in a fermentation chamber, but I am unsure what to do about the neutral wire on tube heater and on the mains in plug? Very clear description for the 12v version !

@anthonychallis2472 7 жыл бұрын

Great video and really useful info, just what I am looking for to control a fan in a small network cupboard, thanks Big Clive.

@CoolDudeClem 7 жыл бұрын

How can you stand temperatures _that_ cold? Anything under 26c feels like freezing for me.! I can't wait for the Summer to come back, God I miss it so much right now you have no idea

@ERIFNOMI 7 жыл бұрын

CoolDudeClem holy shit, I have the air on way before it gets to 26C (79F).

@dalriada842 7 жыл бұрын

I usually have it at about 15C. 12C at night. I only crank it up to 20C if I have visitors. I'm also a Scot. I guess it depends on the type of climate you're used to. Also the cost of energy where you are. 26C would have me panting on the floor!

@TheJohn8765 7 жыл бұрын

+dalriada842 I'd melt at 26. I'm comfy at 15 (if I'm just sitting), less if I 'm doing something. But I'm a Scot Canadian. I imagine CoolDude is from somewhere a bit hotter. It is funny watching new immigrants from Africa coming here and putting parkas on when it's 20 out ;)

@alanpartridge2140 7 жыл бұрын

26 that shorts and no shirt weather!

@dalriada842 7 жыл бұрын

20C would be a warm summer's day here. :)

@Neighbour_Al 7 жыл бұрын

Nice price! I have one on order as a remote low temperature alarm for my orchard. Thanks! Oh, AC/DC current clamp arrived and is working wey.

@cliffschooling8591 8 ай бұрын

Excellent video. Need to think about the potential issue with a thermostat failure. Im using it to run a 10w heat pad for bee hives, so dinnae want them cooked.

@bigclivedotcom 8 ай бұрын

You could add a traditional bimetallic thermal switch chosen for a higher temperature. An inline thermal fuse could be used as a last resort.

@HobbyFX 5 жыл бұрын

just a quick thank you for this video. i've just got one of the mains controllers and it works well.... now i know how it works! ;) You have great channel too, you've got a new sub today :)

@DeoMachina 7 жыл бұрын

You ever wonder if China has much better stuff for its factories, and they just don't export it much?

@SuperAWaC 7 жыл бұрын

they have just good enough stuff for their factories, like the controller in the video. you're not gonna see much honeywell in china.

@K0balts 7 жыл бұрын

Wonder no more. I have been to China many times before. And yes. Their policy is a little bit self centered. they keep all the good stuff for them selves and export lower quality stuff. Unless you buy really expensive high end performance parts and whatnot.

@Brainstorm4300 7 жыл бұрын

DeoMachina They have different versions of the same stuff. You get what you pay for basically. And yes they usually use the ones that are of good quality. Big Chinese dealers also sell stuff based on regions since in poorer regions people value money more than quality.

@DeoMachina 7 жыл бұрын

I suppose that makes sense, since the west already produces good stuff, China can't compete as well with the extra overheads tacked on

@jusb1066 7 жыл бұрын

no reason not to finance the better stuff by selling it as well, im sure they use a combination of cheaper stuff and better stuff, we can buy both if we try, most of the better stuff is sold under name brands here, the cheaper stuff is sold as generic or value brands, look at say a expensive name brand, its still made in china, they probably design their own face for it, but use the guts of a decent chinese module

@holmesway 4 жыл бұрын

Thank you for the clear explanation, it's great not having a Yank hoping for an Oscar. I have a positive pressure ventilation unit in a loft of a home that I let. It doesn't shut off when the loft temperature falls low. I can now control it to shut off when it falls too low.

@hgbugalou 7 жыл бұрын

I have a module almost exactly like that as a fan controller. Its mains voltage though and just the board.

@GlynisDance Жыл бұрын

Thank you - much appreciated!

@TheAkashicTraveller 7 жыл бұрын

Back when we had an immersion heater for hot water the thermostat failed a couple times. For some stupid reason it's fail condition was on. So we found out by turning the tap on and steam coming out instead of water :/ So yeah potentially quite dangerous but fortunately no one was injured. It did fill the whole of the upstairs with steam though.

@deivladislav 7 жыл бұрын

subscribed an hour ago and here is new video

@waynejohnson6441 7 жыл бұрын

new vids just about every day/night hes a night owl

@rosstga 2 жыл бұрын

Hi its a great unit, i use it for an alarm if my freezer temp comes up and a red light comes on.

@Vantss 7 жыл бұрын

I got that other temp controller you were messing with, and it's been great! This one is real nice lookin though, would have been way quicker to use, not that I mind making an enclosure though.

@simonbosch4300 6 жыл бұрын

Nice video showing how this works. Thank you. I have question in regard to temperature setting. In the event of a power failure, will the unit restore back to the last set temperatures for the "Start" and "Stop" Or it will reset back to the factory default value?

@bigclivedotcom 6 жыл бұрын

It should store the settings.

@tamaheva292 3 жыл бұрын

I just bought mine from shopee. Received today. 220v 1500w version. I saw relay is for 120vac support 7A.

@doctorlighthouse 4 жыл бұрын

Thank you for this nice review. I will be ordering one for my little greenhouse. You really deserve that ice-cold beverage ;-)

@Io1564 4 жыл бұрын

@Paul D. note that this is only IP22 protection class and only for indoor use. If you use it in a greenhouse it might not last long and is also not very safe. I would at least put it into a hefty plastic bag or plastic box and seal it. and use a solid state relay to switch the load if it's more than 30-40 Watt. these little relays are not designed for high resistive loads.

@Estabanwatersaz 7 жыл бұрын

Thanks for another great video, Mr Clive

@SynKronos 6 жыл бұрын

I have two of these. 240 Volt rated 10amp. I wont be putting 2.4Kw down those little wires let alone rely on the relay.

@ReevansElectro 7 жыл бұрын

Probe failure should leave it in the safest situation for THE LOAD FUNCTION. If the function of the relay was set to cool, the failsafe should be COOLING. If the set function of the relay was to heat, the failsafe should be HEATING.

@ib9rt 7 жыл бұрын

Not always. When domestic ovens fail on it causes fumes, smoke, heat damage and in the worst cases sets the kitchen on fire. Not a good idea.

@ReevansElectro 7 жыл бұрын

Probe failure should leave it in the safest situation for THE LOAD FUNCTION.

@ib9rt 7 жыл бұрын

Not always. When domestic ovens fail on it causes fumes, smoke, heat damage and in the worst cases sets the kitchen on fire. Not a good idea.

@jamest.5001 3 жыл бұрын

I ordered a 12v module, and received a 220v version, the funny bit was they supposed to been sold out of everything but the 12v, ha-ha, just my luck!

@NickStallman 7 жыл бұрын

I think those two zero ohm resistors jumping the slot could be bridging the 12v to the relay? So your model actually has 12v on the relay, but remove those two resistors and you just get the bare relay contacts? That would explain why it's jumping the anti-tracking slot.

@lwilton 7 жыл бұрын

It looks like it might not be too hard to hack that into a dry contact relay. But since you can get a near-identical unit for the same price that is already dry contact, there wouldn't be much point in doing so.

@asthecryflows 7 жыл бұрын

If this was used in a cooling application, say running a fan on hot electronics, wouldn't you want the failure scenario to turn on the fan? Seems to me that might have been the logic behind turning on the output if the thermistor fails. Would be nice to have the failure state configurable, but I guess you can't ask for much given the cost.

@KillerSpud 7 жыл бұрын

+bigclivedotcom I noticed something interesting at about 30 seconds. While you held the piece of paper, the seven segment displays were flickering, but shortly after you moved the paper off screen the flickering stopped. I assume that is the ipad adjusting the white balance. Could you use this to correct flickering in the future? Might be worth a few minutes experimentation.

@thelydiaspringexperiment6437 2 жыл бұрын

it may adjust white balance (which should be manually set before filming) but the flicker stopped due to the shutter speed reducing to below the multiplex clock

@martinmcleish7688 4 жыл бұрын

thanks for your video. i got mine working to come on at 18c and go off at 24c. found today the power out light does no longer come on. probe is still reading accurately but as i say no power output no longer comes on. any ideas please?

@EscapeMCP 7 жыл бұрын

Did it switch on when you shorted the terminals because you didn't short them completely and thus 'measured' a resistance on the thermocouple socket that would be in the 'on' range? You briefly got 27.4ºC on the display when you shorted it and it turned on. A 'proper' short would probably have left the light off and an intermittent one would have the light randomly flashing? Even if this is the case, it's still not ideal that it's just remembering the last setting.

@EscapeMCP 7 жыл бұрын

They are so cheap, just run a few in series to get round this issue!

@IljaSara 7 жыл бұрын

Made an order. I might use it as a fan controller.

@jafafa 7 жыл бұрын

That's a magic piece of paper, it causes LEDs to flicker.

@spudhead169 7 жыл бұрын

Question: I'd like to distill some vodka (I need reasonably pure ethanol as a solvent). I'd tried freeze distilling (putting the vodka in a 2 litre pop bottle and freezing it) then taking the cap off and holding it upside down over a jug and collecting 40cL (from 1L of 40% vodka) that drips out. This yielded about a 75% solution :(. How about if I get one of these things, a SSR and a cheap electric cooking hob. Use the module to turn the hob on and off at around say 85C, that should be enough to boil the ethanol without boiling the water. Then just channel the vapour through a simple condenser and collect? Would that beat 75% do you think?

@annelisemeier283 7 жыл бұрын

SpudHead depends. If done properly but probably not. But you can always daisy chain those cookers.

@spudhead169 7 жыл бұрын

Well I need it as pure as possible, like I mentioned I need it as a solvent so I'm essentially trying to turn a 40% solution (vodka) into 95% (rectified spirit). I tried the oil separation method too, but that only yielded about 75% again, I think once the density becomes low enough to float on the oil that's the best it can do. Using a glass bead column I did read about too, but I'd still need some control over the heating to keep the fractioning point of the water stable.

@avamander. 7 жыл бұрын

There's a destillation limit to ethanol. It needs to be dried with chemicals that react with water or it's boiling point has to be altered.

@spudhead169 7 жыл бұрын

+Eden, yes I think this is the way to go after reading about it. So if I follow you here. The vapour (which is a stronger concentration than the liquid being distilled) starts to condense on the beads in the bottom of the column, the condensate is naturally a stronger concentration, this then re-vapourises forming an even stronger concentrated vapour which again condenses further up the column and the process repeats getting stronger and stronger each time?

@n2n8sda 7 жыл бұрын

Surely there has to be some alternative, easier to obtain solvent? What are you trying to do with this solvent? Rubbing alcohol / Methylated spirits etc would probably be an ok subsitution for most cases.. if it does need to be drinkable woulnd't it be easier to get a bottle of everclear 190 if you're in the states or rectified spirits if your in the rest of the world?

@ramrod126 7 жыл бұрын

I use a 230mm, 12v case fan as a cooling fan in my bedroom window when it is too chilly outside for AC but too hot for heat. My current method of "my lord it is cold in here, better unplug the fan" just went out the window (no pun intended) I think.

@RonSpooner 3 ай бұрын

Hi Clive. Can you see an easy way to change this unit so it it will go to ground instead of supply + power.

@bigclivedotcom 3 ай бұрын

Not sure what you mean by that.

@Ilias_sp 4 жыл бұрын

Mine shows 1,5 degrees more than it actually is, but I can't seem to find a way to calibrate it... I have it for 1 year now in my incubator and im setting it to 39 degrees (Celsius) to actually get the 37.5 that I need). Big negative for this device the absence of calibration option.

@o0OMouseO0o 7 жыл бұрын

It would be interesting to know if that unused 4 way connector under the chip is the SWIM programming port for flashing the firmware onto it in the first place. If it is one pin should to pin 18 (data) and the other to pin 4 (reset) of the chip and the other two being power.

@BlueLineofthesky 3 жыл бұрын

Hi. Your video is very instructive and I wonder if I want to build something similar to a chicken eggs incubator. It is enough to use this thermostat with an incandescent lightbulb or I need an SSD relay as well?

@hipu 7 жыл бұрын

what kind of led magnifying glass do you use? it looks quite handy for reading chips, and you seem to have good luck with that. you could do a video on it, or brief about it in your next Q/A video

@SigEpBlue 7 жыл бұрын

I'd bet it's more reliable than any of the Telemecanique crap I've had to replace over the past decade.

@ScrapinNet 7 жыл бұрын

This actually has some good uses. May have to get one.

@bigclivedotcom 7 жыл бұрын

It falls into the category of cheap, useful module that might come in handy one day.

@dalriada842 7 жыл бұрын

I'm looking for something that controls both temperature and humidity. They seem to be quite a bit more expensive. :(

@DrTune 7 жыл бұрын

also easily reprogrammed (just get ST Visual Develop (free) and a $2 ST-Link clone) , those STM8's are pretty nice MCUs in a lot of ways; using that very chip on a project right now - terrific value for money

@meatfoot4803 7 жыл бұрын

Thank you so much for this great site, just found it.

@stormbytes 5 жыл бұрын

Exactly what I needed!! Thank you

@michaelnott8631 2 жыл бұрын

Just came across this video and bought some my question is how do I change the temperature sensor as I need a longer waterproof proof one Thank you

@bigclivedotcom 2 жыл бұрын

You can extend the existing one and pot it in resin. If you measure the resistance at around 20 degrees Celsius it will indicate which type of thermistor it is. Often 10K (10,000 ohms).

@mikeverbeeckLaManga 4 жыл бұрын

Hello you test was very usefull thank you. Could you please do the same for XK-W1099 dual temperature and humidity control? I am not sure I understand how to program it.

@zx8401ztv 7 жыл бұрын

Yep thats simple with bugger all to go wrong, should be very reliable :-D That same setup could be used to keep a soldering iron at the correct temprature with software tampering and a different sensor.

@paolobuoso2155 6 ай бұрын

HI I have the 230V variant and for some reasons when it reaches the setted temperature the red light keeps blinking and the relè turns on and off repeatedly. Any advise? thanks

@twocvbloke 7 жыл бұрын

I'd probably find this useful if I could ever be bothered to turn my failed mini-freezer into a mini-fridge using peltier power, but, given the nature of the peltier cooler, it's too expensive to run!! :\ And I love spoonerisms, there's an old HGV trailer at the bottom of this street in a truck tyre changer's yard, and it's for a food distributor called "Booker Fitch", always makes me laugh when I look at it from the garden... :P

@man9149 5 жыл бұрын

can we change the output (light) with a heater?

@aggrobert8490 4 жыл бұрын

I use a main voltage version with a 40w halogen bulb to heat a breader for hatching eggs And the setup works fine for about 5000 hours The last 3 jears! So I thrust in this little China controller

@man9149 4 жыл бұрын

@@aggrobert8490 ive used it for my Final Year Project, and believe me, this things can work higher than ur expectations